Topcon SRL-35 - Radio Parameters; Configuration of Radio Protocol Using SL Commands

Appendix B
Changing Parameters Using the SL Commands
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SRL-35 Operator’s Manual P/N: 1003224-01
Radio Parameters
Configuration of Radio Protocol using SL Commands
“SL@S=” command selects the compatibility mode:
• ”SL@S=0” sets SATELLINE-3AS (default).
• ”SL@S=1” sets PCC-4FSK
• ”SL@S=2” sets PCC-GMSK
• ”SL@S=3” sets TRIMTALK GMSK, RX fitted to Pacific Crest transmitters
• “SL@S=4” sets TRIMTALK GMSK, RX fitted to Trimble transmitters
• “SL@S=5” sets PCC-FST
The modem responds with “OK” message if the requested mode is supported or “ERROR” if the mode is
not allowed.
“SL@S? enquirers the active mode. The modem responds with a number:
• “0” if the mode is SATEL 3AS
• “1” if the mode is PCC-4FSK
• “2” if the mode is PCC-GMSK
• “3” if the mode is TRIMTALK GMSK, RX fitted to Pacific Crest transmitters
• “4” if the mode is TRIMTALK GMSK, RX fitted to Trimble transmitters
• “5” if the mode is PCC-FST
Table 32. Radio Parameter Commands
Command Effect and description of command
SL@R? Get field strength of the last received message (the value is an average of many measurements made
during the same reception).
Response ”-xx dBm”, where xx is a decimal value of the field strength and it is between –80 dBm and
–118 dBm. Value available 7s after reception. SATELLINE-3AS Epic returns the stronger value of two
receivers.
SL@P=xxxxx Set RF output power, where xxxxx is the decimal value of the intended power in mW. If the given
value does not correspond to one of the programmed power levels, the output power is set to the
nearest possible value.
SL@P? Get RF output power.
Response ”xxxxx mW”, where xxxxx is a decimal value the output power of the transmitter.
SL@T=-xxx Set minimum power level of the signal to be received (="Signal Threshold level), where xxx is a
decimal value of the new intended level in dBm.
SL@T? Get current "Signal Threshold Level". Response is "-xxx dBm.
SL@D=x Set TX delay. Value x = 0…65535 ms
SL@D? Get TX delay value. Response ‘x ms’
SL@F? Get current noise level on the radio channel. Response "-xxx dBm".